DA20-C1 Flight Manual
Description
Doc # DA202-C1 April 06, 2010 Page 7 - 15
7.9.3. Mixture Control
A. Cruise
The mixture control allows leaning of the fuel mixture to maximize fuel economy during
cruise conditions. Teledyne Continental Motors specifies that above 75% of maximum
rated power, the mixture must be set at FULL RICH. It should be noted that even with
the throttle set at the full power position, actual power may be less than 75% of
maximum rated power and then leaning is required (reference Section 5.3.2, Cruise
Performance).
B. Reduced Throttle Settings
When operating at reduced throttle settings, other than steady state cruise, the mixture
should always be set to FULL RICH. This applies to maneuvers (e.g.: stalls, spins, slow
flight), descents, landing approaches, after landing and while taxiing.
The only exception to this is for engines without the altitude compensating fuel pump,
operating at very high altitudes, where the low air density may require leaning to
maintain satisfactory engine operation.
C. Full Throttle
When operating at full throttle, the mixture must be set at FULL RICH. This applies to
take-off, balked landings and climb.
The only exception is for engines without the altitude compensating fuel pump the
mixture should be leaned as actual power falls below 75% of maximum rated power, as
may be the case in an extended climb (reference Section 5.3.2, Cruise performance).
NOTE
All adjustment of the mixture control should be done in small
increments.
7.9.4. Propeller
Revision 25
The propeller is a fixed pitch Sensenich wood propeller.
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